This used to be a distinct kind of drag, but ended up being refactored into something that happens during a regular drag. Has not been used in quite some time.
d47b581cbb remove RegionRippleDrag
gtk2_ardour/editor.h | 1 -
gtk2_ardour/editor_drag.cc | 332 ---------------------------------------------
gtk2_ardour/editor_drag.h | 28 ----
3 files changed, 361 deletions(-)